A146462 - OEIS

A146462

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-0100 pattern in any orientation.

1, 1, 1, 1, 1, 1, 17, 31, 679, 1365, 17627, 46035, 1583863, 5152353, 644498775, 2733408045, 569392682481, 3041130002347, 940096451199787, 6289498795341393, 4314014762481308841, 36346991541862011089, 57204732976870800644143

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.1.0.0.0.0.0.0.1

.0.0.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A146800 A146731 A146667 * A089171 A279370 A276592

Adjacent sequences: A146459 A146460 A146461 * A146463 A146464 A146465

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved